Question 1

What are the cheapest airlines flying from Seattle to London round-trip?

Accepted Answer

According to our current data, Icelandair (C$ 702), Virgin Atlantic (C$ 818), and Lufthansa (C$ 828) offers the cheapest pricing from Seattle to London. These flights start at 40% lower than the current average price 3 months from now.

Question 2

What are the cheapest airlines to fly from Seattle to London one-way?

Accepted Answer

C$ 468 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on WestJet and SWISS, with prices starting from C$ 553 and C$ 647, respectively.

Question 3

How recently were the Seattle to London flight deals updated?

Accepted Answer

The Seattle to London flight deals you see on this page were last updated on 17/6.

Question 4

How far ahead should I book a flight from Seattle to London?

Accepted Answer

The price you pay for your flight from Seattle to London may vary depending on when you book. For the best chance of a lower fare, look to book 7 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

Question 5

What is the cheapest month to book a flight from Seattle to London?

Accepted Answer

Currently, January is the cheapest month in which you can book a flight from Seattle to London (average of C$ 560). Flying from Seattle to London in July is currently the most expensive (average of C$ 918). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Question 6

What is the cheapest day to fly from Seattle to London?

Accepted Answer

Travelers seeking maximum savings on their Seattle to London flight should consider departing on Tuesday evenings when fares are most often at their lowest. Saturday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Question 7

E

Accepted Answer

In terms of precipitation, rainfall in London ranges from 40.0 - 70.0 mm per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London when rainfall is around 40.0 mm.

Question 8

E

Accepted Answer

If weather is an important factor for your trip to London, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

Question 9

What are the cheapest flights from Seattle to London?

Accepted Answer

Looking at all options, your cheapest flight can be booked for C$ 638. While the most popular route (Seattle/Tacoma Intl - London Heathrow) can be booked for C$ 847 on average our data indicates C$ 2,389 when flying from Seattle to London.

Question 10

What are the most reliable airlines from Seattle to London?

Accepted Answer

The top 3 most reliable airlines when flying from Seattle to London are American Airlines (68%), Aer Lingus (68%) and Finnair (68%).

Question 11

What are the most popular airlines that fly from Seattle to London?

Accepted Answer

Consider Air France, Finnair or British Airways when booking your flight. These represent the most popular airlines when flying from Seattle to London.

Question 12

Can I find flights from Seattle to London for under C$ 700 on Cheapflights?

Accepted Answer

Yes, there are multiple flights from Seattle to London for under C$ 700. The cheapest flight booked recently is on Multiple Airlines for just C$ 661, but on average you can expect to pay C$ 784.

Question 13

Are there direct flights from Seattle to London for under C$ 1,100 on Cheapflights?

Accepted Answer

Cheapflights has 20 direct flights from Seattle to London under C$ 1,100. A good price for a direct flight from Seattle to London is less than C$ 1,145.

Question 14

Are there last-minute flights available from Seattle to London for under C$ 1,600?

Accepted Answer

There are currently 20+ open flights from Seattle to London within the next 7 days for less than C$ 1,600.

Question 15

What is the cheapest day to fly round-trip from Seattle to London?

Accepted Answer

Saturday is generally a great day to depart. Flying on this day could help you save up to 29%.

Question 16

How far in advance should I book a flight from Seattle to London?

Accepted Answer

To save up to 53% on this flight, we recommend booking at least 8 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Seattle to London from C$ 904 1-2 weeks out and tickets from C$ 1,383 for flights departing within the next 72 hours.

Question 17

What is the cheapest month to fly from Seattle to London?

Accepted Answer

November is one of the best times of the year to fly to London from Seattle. Prices for November average C$ 1,170 per person but you can even find prices for as low as C$ 773. The most expensive prices can be found in the month of June. Opting for a November flight can save you 41% on your journey compared to booking in June

Question 18

What is the cheapest time of day to fly from SEA to LON?

Accepted Answer

It’s optimal to fly from Seattle to London in the morning. By choosing this option you can save up to 26% on the cost of your flight, compared to a flight at noon.

Question 19

What airport do you fly from for flights from Seattle to London?

Accepted Answer

Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to London. On average, Seattle/Tacoma Intl has 19 outbound flights to London per day from 7 airlines. Seattle/Tacoma Intl is conveniently located just 18.4 km from Seattle’s city centre.

Question 20

Accepted Answer

One of the most popular airlines travelling from Seattle to London is United Airlines. Flights on this route from United Airlines typically cost C$ 784.79 RT, a price that is 106% more expensive than the average Seattle to London flight. The cheapest flight found was C$ 658 RT. Seattle/Tacoma Intl Airport is the most common Seattle airport to take off from when flying to London. London Heathrow Airport is the most popular arrival airport in London. When flying from Seattle to London, United Airlines flights are 10% more popular than any other airline flying that same route.

Question 21

Accepted Answer

KLM is one of the most popular airlines used for those travelling from Seattle to London. Seattle to London flights are typically 122% more expensive than other airlines travelling the same route. Flights from KLM typically cost C$ 697.47 RT. The cheapest KLM flight found for this route was C$ 603. The most popular departure airport in Seattle when flying to London is Seattle/Tacoma Intl Airport. The most popular airport to fly into when visiting London is London Heathrow Airport. When flying from Seattle to London, KLM flights are 5% more popular than any other airline flying that same route.

Question 22

What does SEA to LHR mean?

Accepted Answer

SEA and LHR are unique codes to identify airports used in the aviation industry. They are defined by IATA (International Air Transport Association) and are commonly called IATA codes. SEA to LHR refers to a flight route from Seattle/Tacoma Intl Airport to London Heathrow Airport. London Gatwick Airport (LGW), London Stansted Airport (STN), London Luton Airport (LTN), London City Airport (LCY), London Southend Airport (SEN) are other airports near this flight route and their unique identifiers/IATA codes.

Question 23

Can I find deals for flights from Seattle to London that include extra baggage allowance?

Accepted Answer

The amount of baggage you can bring on your Seattle to London flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

Question 24

Can I find deals on flights from Seattle to London with specific airlines?

Accepted Answer

Yes, Cheapflights allows you to browse and filter Seattle to London flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

Question 25

Can I find deals for flights from Seattle to London that include hotel bookings?

Accepted Answer

Yes. In addition to deals on Seattle to London flights, Cheapflights offers vacation packages that include both flights and hotel.

Question 26

How can I find direct flights from Seattle to London?

Accepted Answer

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to London.

Question 27

Can I find deals for business class flights from Seattle to London?

Accepted Answer

Yes. Cheapflights offers flight deals from Seattle to London by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Question 28

Can I find deals for flights from Seattle to London that allow pets onboard?

Accepted Answer

Many airlines flying from Seattle to London offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

Question 29

Can I find deals on last-minute flights from Seattle to London?

Accepted Answer

Yes, you can often find last-minute deals on Seattle to London flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

Question 30

How does Cheapflights help users find flights from Seattle to London?

Accepted Answer

Cheapflights helps you search for flights from Seattle to London via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Question 31

Why should you use Cheapflights to find cheap flight tickets from Seattle to London?

Accepted Answer

Cheapflights taps into our reliable network of hundreds of airlines and travel agencies to find the best deals for flights from Seattle to London for you. Better yet — we are completely free to use.

Question 32

Can Cheapflights find flights from Seattle to London with no change fees?

Accepted Answer

Users can book flights with no change fees policies with our dedicated filters. Book flights from Seattle to London flexibly with Cheapflights today.

Question 33

Can Cheapflights notify me if prices for flights from Seattle to London become cheaper?

Accepted Answer

Yes! Start tracking prices for Seattle to London flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

Popular in	June
Cheapest in	November
Round-trip from	C$ 758
One-way from	C$ 656

Airline	Cheapest	Average	Flexibility	On-time
Icelandair	CheapestC$ 670	AverageC$ 1,161	FlexibilityNo cancel fee	On-time76%	Search Icelandair flights
Air France	CheapestC$ 706	AverageC$ 1,079	FlexibilityNo cancel fee	On-time77%	Search Air France flights
Iberia	CheapestC$ 748	AverageC$ 1,074	FlexibilityNo cancel fee	On-time77%	Search Iberia flights
Finnair	CheapestC$ 828	AverageC$ 958	FlexibilityNo cancel fee	On-time76%	Search Finnair flights
Virgin Atlantic	CheapestC$ 869	AverageC$ 1,128	FlexibilityNo cancel fee	On-time72%	Search Virgin Atlantic flights
Delta	CheapestC$ 904	AverageC$ 1,078	FlexibilityNo cancel fee	On-timeN/A	Search Delta flights
British Airways	CheapestC$ 915	AverageC$ 1,321	FlexibilityNo cancel fee	On-time70%	Search British Airways flights

1%of flight departures	Early morningMidnight to 6 am
0%of flight departures	Morning6 am to noon
49%of flight departures	AfternoonNoon to 6 pm
50%of flight departures	Evening6 pm to midnight

Sunday	20daily flights
Monday	20daily flights
Tuesday	15daily flights
Wednesday	20daily flights
Thursday	20daily flights
Friday	20daily flights
Saturday	20daily flights

Cheap flights from Seattle to London from C$ 317

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/7. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.

The best prices from Seattle/Tacoma Intl to London are usually found in November or January, booked 7 days in advance, depart on a Sunday or Wednesday and return on a Tuesday

Cheap flight deals from Seattle to London

Popular in

Cheapest in

Round-trip from

One-way from

What is the cheapest day to fly round-trip from Seattle to London?

How far in advance should I book a flight from Seattle to London?

What is the cheapest month to fly from Seattle to London?

What is the cheapest time of day to fly from SEA to LON?

Cheap United Airlines flights from Seattle to London

Find some of the cheapest United Airlines flights travelling from Seattle to London. Make sure to double check the flight details before booking.

Cheap KLM flights from Seattle to London

Explore cheap flight options specifically provided by KLM for the route between Seattle and London. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 437,191 searches. Data last updated 17 June 2024.

To aid your search, here are some of the cheapest KLM flights we've found from Seattle to London. Deals are refreshing constantly so come back soon for more options.

Cheap Seattle to London flights in June & July 2024

Find cheap flight options from Seattle to London specifically for the months of June and July 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 437,191 searches. Prices were last updated on 17 June 2024.

The lowest fares we've come across on flights travelling from Seattle to London in June and July 2024. More deals are always being added, so be sure to check back regularly.

Seattle to London 2024 flight deals

Discover exclusive flight deals for travel between Seattle and London in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 437,191 searches. Data last updated 17 June 2024.

The lowest fares we've come across on flights travelling from Seattle to London in June and July 2024. More deals are always being added, so be sure to check back regularly.

Direct flights to London from Seattle

For a shorter flight, select one of these non-stop flights from Seattle to London. Select from other flights from Seattle to London by using the search form above.

Seattle to London flights leaving soon

Users seeking a last-minute flight from Seattle to London should consider booking one of these fares. To prevent any unwanted surprises, users should verify their flight info before booking.

One-way flights to London from Seattle

Users in need of a one-way flight from Seattle to London can choose from these deals. Those seeking round-trip flights from Seattle to London should utilize the search form at the top of the page.

Find flights from Seattle to London within your budget

How far ahead should I book a flight from Seattle to London?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to London. Price data was last updated on 14 June 2024.

The price you pay for your flight from Seattle to London may vary depending on when you book. For the best chance of a lower fare, look to book 7 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest day to fly from Seattle to London?

Use this chart to determine the cheapest time to fly round-trip from Seattle to London. Price data was last updated on 16 June 2024.

Best time to book a flight from Seattle to London

Have a flexible travel schedule? Discover the best time to fly to London from Seattle with our price prediction graph.

Temperature and rainfall in London by month

Plan your trip to London by taking into account the average temperature and rainfall totals by month.

Reviews of airlines servicing London

Get insights into the airlines that provide service to London. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to London. Reviews last updated 17 June 2024.

To help decide which airline to fly from Seattle to London, see what other customers have to say about United Airlines, KLM and Lufthansa. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Seattle to London. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What airport do you fly from for flights from Seattle to London?

Can I find flights from Seattle to London for under C$ 700 on Cheapflights?

Are there direct flights from Seattle to London for under C$ 1,100 on Cheapflights?

Are there last-minute flights available from Seattle to London for under C$ 1,600?

What are the cheapest airlines flying from Seattle to London round-trip?

What are the cheapest airlines to fly from Seattle to London one-way?

What are the most reliable airlines from Seattle to London?

What are the cheapest flights from Seattle to London?

What does SEA to LHR mean?

Can I find deals for flights from Seattle to London that include extra baggage allowance?

Can I find deals on flights from Seattle to London with specific airlines?

Can I find deals for flights from Seattle to London that include hotel bookings?

How can I find direct flights from Seattle to London?

Can I find deals for business class flights from Seattle to London?

Can I find deals for flights from Seattle to London that allow pets onboard?

Can I find deals on last-minute flights from Seattle to London?

How recently were the Seattle to London flight deals updated?

What are the most popular airlines that fly from Seattle to London?

What is the cheapest month to book a flight from Seattle to London?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to LondonSee prices for flight routes from nearby airports that may be better suited for you.

See prices for flight routes from nearby airports that may be better suited for you.

Top 7 airlines flying from Seattle to London

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Search flights from Seattle to London by cabin class

Find flights from Seattle to London, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Hourly flight availability from Seattle to London

Find hourly flight availability from Seattle to London. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 17 June 2024.

Weekly flight availability from Seattle to London

Explore weekly flight availability from Seattle to London. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated 17 June 2024.

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User searches for flights to these destinations increased 20% or more in the past 90 days compared to other destinations

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Alternative routes for Seattle to London
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